Sulfur is essential for a variety of functions such as Nitrogen metabolism, enzyme activity, and protein and oil synthesis. If your young plants begin yellowing, your soil likely needs a boost in sulfur. Sulfur can be used to lower pH. It can also boost microbial activity in small applications, but be careful not to apply too much or it may become overwhelming to microbes in the soil. This is an excellent product for use in blueberry cultivation as well as for all other acid loving plants. Sulfur can also be used in livestock feed rations.